卡车轮胎气门嘴开裂失效分析  

Failure Analysis on Crack of Air Valves of Truck Tire

作　　者：时军波[1] 徐娜[1] 李永德[1] 吴晓峰[1] 赵梅[1] 李恩霞[1] 

机构地区：[1]山东省科学院山东省分析测试中心山东省材料失效分析与安全评估工程技术研究中心,山东济南250014

出　　处：《热加工工艺》2014年第16期218-220,223,共4页Hot Working Technology

基　　金：山东省科学院科技发展基金项目(科基合字(2011)第4号)

摘　　要：通过宏观形貌检查、化学成分分析、金相检验、扫描电镜及能谱分析等手段,分析了卡车轮胎气门嘴的开裂失效原因。结果表明:该气门嘴的开裂失效主要是由二氧化硫引起的应力腐蚀开裂,以沿晶型开裂为主。最后提出了相应的改进措施。By macroscopic inspection, chemical composition analysis, metallurgical examination, SEM and EDS analysis etc., the corrosion leakage reason of air valve of truck tire was investigated. The results show that the failed nature of the stainless steel coil is mainly attributed to stress corrosion cracking（SCC） caused by sulfur dioxide（SO2） and the crack path is mainly transgranular. The relative improvement measures for preventing the occurrence of the failure were proposed.

关 键 词：卡车 轮胎 气门嘴 黄铜 应力腐蚀开裂 

分 类 号：U463.345[机械工程—车辆工程]